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FBI: Detroit man bought explosives from agent, talked of attack

Posted: 3:28 PM, Aug 02, 2016
Updated: 2016-08-02 15:28:24-04

Federal authorities say they've arrested a Detroit man who bought explosives from an undercover agent after amassing weapons and talking about carrying out an attack.

A criminal complaint filed Monday charges 29-year-old Sebastian Gregerson with unregistered possession of a destructive device and unlicensed receipt of explosive materials.

The complaint chronicles a counterterrorism investigation that began in April 2015 following a tip about Gregerson, who the FBI says also is known as Abdurrahman bin Mikaayl. The investigation found that Gregerson bought a big arsenal of weapons, ammunition, tactical gear and training materials including hundreds of rounds of AK-47 ammunition, road spikes and two ski masks.

The FBI says he bought grenades on Sunday from the undercover agent outside a gas station in Monroe.

Authorities say Gregerson arrived at the meeting with a Beretta M9 that he said he would use as payment for the grenades.

After the exchange was made, Gregerson was taken into custody.

He's being held pending a Thursday detention hearing in U.S. District Court.